Exhaust-muffler



UNITED STATES PATENT OFFICE.

RALPH B. HAIN, OF GRAND RAPIDS, MICHIGAN.

EXHAUST-M UFFLER.

SPECIFICATION forming part of Letters Patent N 0. 577,852, dated March 2, 1897.

Application filed April 8, 1896. Serial No. 586,789. (No model.)

To all whom, it may concern:

Be it known that I, RALPH B. HAIN, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and use ful Improvements in Exhaust-Muiilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in exhaust-mufflers; and its object is to provide the same with certain new and useful features hereinafter more fully described, and particularly pointed out in the claims, reference being had to the accompanying drawings, in which- Figure 1 is a vertical section on the line 1 1 of Fig. 2 of a device embodying my invention, and Fig. 2 a plan view of the same.

Like letters refer to like parts in both of the figures.

A represents a portion of the end of the exhaust-pipe, having a series of lateral openings A at a distance from its outer end, an imperforate diaphragm B, close below said openings, dividing pipe A into two separate compartments, and a second series of similar openings A at a distance below the diaphragm B. A cap 0, having an axial opening, closes the outer end of the pipe A, and in the axis of said cap and extending downward within the pipe A is a smaller pipe D, open at the outer end, having lateral openings D near its inner end, and a cap E closing said inner end. A casing F incloses the exhaust-pipe from the cap 0 down to a point below the lateral openings A. The exhaust-pipe A is thus provided with a series of transverse stops or partitions, consisting of the diaphragm B and the cap G, and a series of lateral openings at a distance from the same, and also an external chamber into which the exhaust passes similarly closed at the upper end and provided with escape-openings at adistance below the same.

The operation of my device is as follows: The exhaust is first cushioned upon a quantity of the previous exhaust held in the pipe A, between the diaphragm l3 and the lateral openings A, and reacting downward escapes laterally through said opening into the space between the jacket F and the pipe A. Here again it encounters another quantity of exhaust material held in the upper part of the said jacket, returning to the pipe A through the openings A and above the diaphragm B, where it again encounters another quantity of exhaust material retained in the end of the pipe A by the cap C. The exhaust-current reacting downward again now finally escapes through the lateral openings D into the pipe D and from thence to the open air. These various impacts of the exhaust upon these Various cushions of elastic material retained in the various chambers effectively break up the pulsations of said exhaust and reduces it to a steady flow from the pipe D, whereby its escape is rendered substantially noiseless.

It is evident that the cap 0 and pipe D may be omitted and the device will still be operative, having two cushions, one in the pipe and one in the casing, or the lateral openings in the pipe A may be omitted together with the diaphragm B and easing F, and a single reaction-chamber will remain and be operative at the upper end of the pipe A.

Vhat I claim is-- 1. The combination with the exhaust pipe, a cap, closing one end of the same and pro vided with an opening, a pipe having an open outer end, extending from said opening downward within the exhaust-pipe, said inner pipe having lateral openings near its inner end, and said inner and outer pipes being relatively of such diameters as to leave a clear chamber surrounding said inner pipe and closed at its top by said cap, and a cap closing the inner end of the inner pipe.

2. The combination, of an exhaust-pipe, having an inlet-opening at one end and an outlet-opening at the other end, and divided intermediate of its ends into two compartments by an im perforate diaphragm, the lower compartment being formed with lateral outlet-openings and the upper compartment having lateral inlet-openings situated only in its lower part, and a closed jacket inclosing that part of the pipe having said openings and diaphragm, the upper end of said jacket terminating at a distance above the inlet-openin gs to the upper compartment, whereby cushions of exhaust-steam are formed in the upper end of the lower compartment and in the 1o ing said exhaust-pipe and extending from the cap to a point beyond all of the lateral openin in said exhaustpipe, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

RALPH B. IIAIN.

\Vitnesses:

LOIS MoULToN, LEWIS E. FLANDERS. 

